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    <h1>
      <a href="../../index.html">All files</a> / <a href="index.html">coa/lib</a> cmd.js
    </h1>
    <div class='clearfix'>
      <div class='fl pad1y space-right2'>
        <span class="strong">81.22% </span>
        <span class="quiet">Statements</span>
        <span class='fraction'>147/181</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">71.64% </span>
        <span class="quiet">Branches</span>
        <span class='fraction'>96/134</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">68.75% </span>
        <span class="quiet">Functions</span>
        <span class='fraction'>33/48</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">82.53% </span>
        <span class="quiet">Lines</span>
        <span class='fraction'>137/166</span>
      </div>
    </div>
  </div>
  <div class='status-line high'></div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict';
&nbsp;
const
    UTIL = require('util'),
    PATH = require('path'),
    EOL = require('os').EOL,
&nbsp;
    Q = require('q'),
&nbsp;
    CoaObject = require('./coaobject'),
    Color = require('./color'),
    Opt = require('./opt'),
    Arg = require('./arg'),
    completion = require('./completion');
&nbsp;
/**
 * Command
 *
 * Top level entity. Commands may have options and arguments.
 *
 * @namespace
 * @class Cmd
 * @extends CoaObject
 */
class Cmd extends CoaObject {
    /**
     * @constructs
     * @param {COA.Cmd} [cmd] parent command
     */
    constructor(cmd) {
        super(cmd);
&nbsp;
        this._parent(cmd);
        this._cmds = [];
        this._cmdsByName = {};
        this._opts = [];
        this._optsByKey = {};
        this._args = [];
        this._api = null;
        this._ext = false;
    }
&nbsp;
    static create(cmd) {
        return new Cmd(cmd);
    }
&nbsp;
    /**
     * Returns object containing all its subcommands as methods
     * to use from other programs.
     *
     * @returns {Object}
     */
    get api() {
        // Need _this here because of passed arguments into _api
        const _this = this;
        this._api || (this._api = function () {
            return _this.invoke.apply(_this, arguments);
        });
&nbsp;
        const cmds = this._cmdsByName;
        Object.keys(cmds).forEach((c) =&gt; {
            this._api[c] = cmds[c].api;
        });
        return this._api;
    }
&nbsp;
    _parent(cmd) {
        this._cmd = cmd || this;
&nbsp;
        this.isRootCmd
            || cmd._cmds.push(this)
            &amp;&amp; this._name
            &amp;&amp; (this._cmd._cmdsByName[this._name] = this);
&nbsp;
        return this;
    }
&nbsp;
    get isRootCmd() {
        return this._cmd === this;
    }
&nbsp;
    /**
     * Set a canonical command identifier to be used anywhere in the API.
     *
     * @param {String} name - command name
     * @returns {COA.Cmd} - this instance (for chainability)
     */
    name(name) {
        super.name(name);
&nbsp;
        this.isRootCmd
            || (this._cmd._cmdsByName[name] = this);
&nbsp;
        return this;
    }
&nbsp;
    /**
     * Create new or add existing subcommand for current command.
     *
     * @param {COA.Cmd} [cmd] existing command instance
     * @returns {COA.Cmd} new subcommand instance
     */
    cmd(cmd) {
        return cmd?
            cmd._parent(this)
            : new Cmd(this);
    }
&nbsp;
    /**
     * Create option for current command.
     *
     * @returns {COA.Opt} new option instance
     */
    opt() {
        return new Opt(this);
    }
&nbsp;
    /**
     * Create argument for current command.
     *
     * @returns {COA.Opt} new argument instance
     */
    arg() {
        return new Arg(this);
    }
&nbsp;
    /**
     * Add (or set) action for current command.
     *
     * @param {Function} act - action function,
     *         invoked in the context of command instance
     *         and has the parameters:
     *                 - {Object} opts - parsed options
     *                 - {String[]} args - parsed arguments
     *                 - {Object} res - actions result accumulator
     *         It can return rejected promise by Cmd.reject (in case of error)
     *         or any other value treated as result.
     * @param {Boolean} [force=false] flag for set action instead add to existings
     * @returns {COA.Cmd} - this instance (for chainability)
     */
    act(act, force) {
        <span class="missing-if-branch" title="if path not taken" >I</span>if(!act) <span class="cstat-no" title="statement not covered" >return this;</span>
&nbsp;
        (!this._act || <span class="branch-1 cbranch-no" title="branch not covered" >force)</span> &amp;&amp; (this._act = []);
        this._act.push(act);
&nbsp;
        return this;
    }
&nbsp;
    /**
     * Make command "helpful", i.e. add -h --help flags for print usage.
     *
     * @returns {COA.Cmd} - this instance (for chainability)
     */
<span class="fstat-no" title="function not covered" >    he</span>lpful() {
<span class="cstat-no" title="statement not covered" >        return this.opt()</span>
            .name('help')
            .title('Help')
            .short('h')
            .long('help')
            .flag()
            .only()
            .act(<span class="fstat-no" title="function not covered" >fu</span>nction() {
<span class="cstat-no" title="statement not covered" >                return this.usage();</span>
            })
            .end();
    }
&nbsp;
    /**
     * Adds shell completion to command, adds "completion" subcommand,
     * that makes all the magic.
     * Must be called only on root command.
     *
     * @returns {COA.Cmd} - this instance (for chainability)
     */
<span class="fstat-no" title="function not covered" >    co</span>mpletable() {
<span class="cstat-no" title="statement not covered" >        return this.cmd()</span>
            .name('completion')
            .apply(completion)
            .end();
    }
&nbsp;
    /**
     * Allow command to be extendable by external node.js modules.
     *
     * @param {String} [pattern]  Pattern of node.js module to find subcommands at.
     * @returns {COA.Cmd} - this instance (for chainability)
     */
    extendable(pattern) {
        this._ext = pattern || true;
        return this;
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    _e</span>xit(msg, code) {
<span class="cstat-no" title="statement not covered" >        return process.once('exit', <span class="fstat-no" title="function not covered" >fu</span>nction() {</span>
<span class="cstat-no" title="statement not covered" >            msg &amp;&amp; console.error(msg);</span>
<span class="cstat-no" title="statement not covered" >            return process.exit(code || 0);</span>
        });
    }
&nbsp;
    /**
     * Build full usage text for current command instance.
     *
     * @returns {String} usage text
     */
<span class="fstat-no" title="function not covered" >    us</span>age() {
        const res = <span class="cstat-no" title="statement not covered" >[];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        this._title &amp;&amp; res.push(this._fullTitle());</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        res.push('', 'Usage:');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        this._cmds.length</span>
            &amp;&amp; res.push([
                '', '', Color('lred', this._fullName()), Color('lblue', 'COMMAND'),
                Color('lgreen', '[OPTIONS]'), Color('lpurple', '[ARGS]')
            ].join(' '));
&nbsp;
<span class="cstat-no" title="statement not covered" >        (this._opts.length + this._args.length)</span>
            &amp;&amp; res.push([
                '', '', Color('lred', this._fullName()),
                Color('lgreen', '[OPTIONS]'), Color('lpurple', '[ARGS]')
            ].join(' '));
&nbsp;
<span class="cstat-no" title="statement not covered" >        res.push(</span>
            this._usages(this._cmds, 'Commands'),
            this._usages(this._opts, 'Options'),
            this._usages(this._args, 'Arguments')
        );
&nbsp;
<span class="cstat-no" title="statement not covered" >        return res.join(EOL);</span>
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    _u</span>sage() {
<span class="cstat-no" title="statement not covered" >        return Color('lblue', this._name) + ' : ' + this._title;</span>
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    _u</span>sages(os, title) {
<span class="cstat-no" title="statement not covered" >        if(!os.length) <span class="cstat-no" title="statement not covered" >return;</span></span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        return ['', title + ':']</span>
            .concat(os.map(<span class="fstat-no" title="function not covered" >o </span>=&gt; <span class="cstat-no" title="statement not covered" >`  ${o._usage()}`)</span>)
            .join(EOL);
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    _f</span>ullTitle() {
<span class="cstat-no" title="statement not covered" >        return `${this.isRootCmd? '' : this._cmd._fullTitle() + EOL}${this._title}`;</span>
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    _f</span>ullName() {
<span class="cstat-no" title="statement not covered" >        return `${this.isRootCmd? '' : this._cmd._fullName() + ' '}${PATH.basename(this._name)}`;</span>
    }
&nbsp;
    _ejectOpt(opts, opt) {
        const pos = opts.indexOf(opt);
        if(pos === -1)
            return;
&nbsp;
        return opts[pos]._arr?
            opts[pos]
            : opts.splice(pos, 1)[0];
    }
&nbsp;
    _checkRequired(opts, args) {
        if(this._opts.some(opt =&gt; opt._only &amp;&amp; opt._name in opts)) return;
&nbsp;
        const all = this._opts.concat(this._args);
        let i;
        while(i = all.shift())
            if(i._req &amp;&amp; i._checkParsed(opts, args))
                return this.reject(i._requiredText());
    }
&nbsp;
    _parseCmd(argv, unparsed) {
        unparsed || (unparsed = []);
&nbsp;
        let i,
            optSeen = false;
        while(i = argv.shift()) {
            i.indexOf('-') || (optSeen = true);
&nbsp;
            if(optSeen || !/^\w[\w-_]*$/.test(i)) {
                unparsed.push(i);
                continue;
            }
&nbsp;
            let pkg, cmd = this._cmdsByName[i];
            if(!cmd &amp;&amp; this._ext) {
                if(typeof this._ext === 'string') {
                    pkg = ~this._ext.indexOf('%s')?
                        UTIL.format(this._ext, i)
                        : this._ext + i;
&nbsp;
                } else <span class="missing-if-branch" title="else path not taken" >E</span>if(this._ext === true) {
                    pkg = i;
                    let c = this;
                    while(true) { // eslint-disable-line
                        pkg = c._name + '-' + pkg;
                        if(c.isRootCmd) break;
                        c = c._cmd;
                    }
                }
&nbsp;
                const cmdDesc = tryCatch(() =&gt; require(pkg));
                <span class="missing-if-branch" title="else path not taken" >E</span>if(cmdDesc) {
                    if(typeof cmdDesc === 'function') {
                        this.cmd().name(i).apply(cmdDesc).end();
&nbsp;
                    } else <span class="missing-if-branch" title="else path not taken" >E</span>if(typeof cmdDesc === 'object') {
                        this.cmd(cmdDesc);
                        cmdDesc.name(i);
&nbsp;
                    } else <span class="cstat-no" title="statement not covered" >throw new Error('Error: Unsupported command declaration type, '</span>
                        + 'should be a function or COA.Cmd() object');
&nbsp;
                    cmd = this._cmdsByName[i];
                }
            }
&nbsp;
            if(cmd) return cmd._parseCmd(argv, unparsed);
&nbsp;
            unparsed.push(i);
        }
&nbsp;
        return { cmd : this, argv : unparsed };
    }
&nbsp;
    _parseOptsAndArgs(argv) {
        const opts = {},
            args = {},
            nonParsedOpts = this._opts.concat(),
            nonParsedArgs = this._args.concat();
&nbsp;
        let res, i;
        while(i = argv.shift()) {
            if(i !== '--' &amp;&amp; i[0] === '-') {
                const m = i.match(/^(--\w[\w-_]*)=(.*)$/);
                if(m) {
                    i = m[1];
                    this._optsByKey[i]._flag || argv.unshift(m[2]);
                }
&nbsp;
                const opt = this._ejectOpt(nonParsedOpts, this._optsByKey[i]);
                if(!opt) return this.reject(`Unknown option: ${i}`);
&nbsp;
                if(Q.isRejected(res = opt._parse(argv, opts))) return res;
&nbsp;
                continue;
            }
&nbsp;
            i === '--' &amp;&amp; (i = argv.splice(0));
            Array.isArray(i) || (i = [i]);
&nbsp;
            let a;
            while(a = i.shift()) {
                let arg = nonParsedArgs.shift();
                if(!arg) return this.reject(`Unknown argument: ${a}`);
&nbsp;
                arg._arr &amp;&amp; nonParsedArgs.unshift(arg);
                <span class="missing-if-branch" title="if path not taken" >I</span>if(Q.isRejected(res = arg._parse(a, args))) <span class="cstat-no" title="statement not covered" >return res;</span>
            }
        }
&nbsp;
        return {
            opts : this._setDefaults(opts, nonParsedOpts),
            args : this._setDefaults(args, nonParsedArgs)
        };
    }
&nbsp;
    _setDefaults(params, desc) {
        for(const item of desc)
            item._def
                &amp;&amp; !(item._name in params)
                &amp;&amp; item._saveVal(params, item._def);
&nbsp;
        return params;
    }
&nbsp;
    _processParams(params, desc) {
        const notExists = [];
&nbsp;
        for(const item of desc) {
            const n = item._name;
&nbsp;
            <span class="missing-if-branch" title="if path not taken" >I</span>if(!(n in params)) {
<span class="cstat-no" title="statement not covered" >                notExists.push(item);</span>
<span class="cstat-no" title="statement not covered" >                continue;</span>
            }
&nbsp;
            const vals = [].concat(params[n]);
            delete params[n];
&nbsp;
            let res;
            for(const v of vals)
                <span class="missing-if-branch" title="if path not taken" >I</span>if(Q.isRejected(res = item._saveVal(params, v)))
<span class="cstat-no" title="statement not covered" >                    return res;</span>
        }
&nbsp;
        return this._setDefaults(params, notExists);
    }
&nbsp;
    _parseArr(argv) {
        return Q.when(this._parseCmd(argv), (p) =&gt;
            Q.when(p.cmd._parseOptsAndArgs(p.argv), (r) =&gt; ({
                cmd : p.cmd,
                opts : r.opts,
                args : r.args
            })));
    }
&nbsp;
    _do(inputPromise) {
        return Q.when(inputPromise, (input) =&gt; {
            return [this._checkRequired]
                .concat(input.cmd._act || <span class="branch-1 cbranch-no" title="branch not covered" >[])</span>
                .reduce((res, act) =&gt;
                    Q.when(res, (prev) =&gt; act.call(input.cmd, input.opts, input.args, prev)),
                    void 0);
        });
    }
&nbsp;
    /**
     * Parse arguments from simple format like NodeJS process.argv
     * and run ahead current program, i.e. call process.exit when all actions done.
     *
     * @param {String[]} argv - arguments
     * @returns {COA.Cmd} - this instance (for chainability)
     */
<span class="fstat-no" title="function not covered" >    ru</span>n(argv) {
<span class="cstat-no" title="statement not covered" >        argv || (argv = process.argv.slice(2));</span>
&nbsp;
        const cb = <span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >(c</span>ode) =&gt; <span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >(r</span>es) =&gt; <span class="cstat-no" title="statement not covered" >res?</span></span></span>
            this._exit(res.stack || res.toString(), res.exitCode || code)
            : this._exit();
&nbsp;
<span class="cstat-no" title="statement not covered" >        Q.when(this.do(argv), cb(0), cb(1)).done();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        return this;</span>
    }
&nbsp;
    /**
     * Invoke specified (or current) command using provided
     * options and arguments.
     *
     * @param {String|String[]} [cmds] - subcommand to invoke (optional)
     * @param {Object} [opts] - command options (optional)
     * @param {Object} [args] - command arguments (optional)
     * @returns {Q.Promise}
     */
    invoke(cmds, opts, args) {
        cmds || (<span class="branch-1 cbranch-no" title="branch not covered" >cmds = [])</span>;
        opts || (opts = {});
        args || (args = {});
        typeof cmds === 'string' &amp;&amp; (cmds = cmds.split(' '));
&nbsp;
        if(arguments.length &lt; 3 &amp;&amp; !Array.isArray(cmds)) {
            args = opts;
            opts = cmds;
            cmds = [];
        }
&nbsp;
        return Q.when(this._parseCmd(cmds), (p) =&gt; {
            if(p.argv.length)
                return this.reject(`Unknown command: ${cmds.join(' ')}`);
&nbsp;
            return Q.all([this._processParams(opts, this._opts), this._processParams(args, this._args)])
                .spread((_opts, _args) =&gt;
                    this._do({
                        cmd : p.cmd,
                        opts : _opts,
                        args : _args
                    })
                    .fail(<span class="fstat-no" title="function not covered" >(r</span>es) =&gt; <span class="cstat-no" title="statement not covered" >(res &amp;&amp; res.exitCode === 0)?</span>
                        res.toString()
                        : this.reject(res)));
        });
    }
}
&nbsp;
/**
 * Convenient function to run command from tests.
 *
 * @param {String[]} argv - arguments
 * @returns {Q.Promise}
 */
Cmd.prototype.do = function(argv) {
    return this._do(this._parseArr(argv || []));
};
&nbsp;
function tryCatch(fn, cb) {
    try {
        return fn();
    } catch(e) {
<span class="cstat-no" title="statement not covered" >        return cb(e);</span>
    }
}
&nbsp;
module.exports = Cmd;
&nbsp;</pre></td></tr>
</table></pre>
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